A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

A Manhattan office building is home to the world's largest chess board.

The most confusing clock in New York.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

The notorious headquarters of a corrupt political machine.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A curious friendship between two inanimate ladies.

The site of the deadly Triangle Shirtwaist Factory Fire.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Commemorating the spot where the famous scientist fed his pigeons.

Salute the leader of the proletariat.

Come for the waffles, stay for more waffles.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

There must be a pun in this haystack somewhere...

A whimsical, but often overlooked clock in Park Avenue.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A hidden "place of interment for gentlemen."

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.